Magnetic separator for grain chutes



March 28, 1950 J. KOTlLlNEK MAGNETIC SEPARATOR FOR GRAIN CHUTES 2 Sheets-Sheet 1 Filed June 26, 1946 M rch 28,1950

J. KOTILINIEK MAGNETIC SEP ARATOR FOR GRAIN CHUTES Filed June 26, 1946 2 Sheets-Sheet 2 (B 4%wza0 M Patented Mar. 28, 1950 MAGNETIC SEPARATOR FOR GRAIN CHUTES John Kotilinek, Berwyn, Ill., assignor to Prater Pulverizer Company, Chicago, 111., a corporation of Illinois Application June 26, 1946, Serial No. 679,501

. 1 This invention relates to a device for separating metallic articles from grain and other edibles, and its principal object is to provide a simple and easily operated separating device for. ridding grain and other edibles of metals that may be collected therewith.

It is well known that screws, nails, bolts and other metallic articles find their way into grain and other edibles and must be separated therefrom before the grain or other edibles are run through processing machines, as otherwise such metallic articles are likely'to cause serious damage to the machinery.

' In accordance with the present invention, magnets are employed to collect the metallic articles, which magnets are mounted on a slide and have magnet plates which cooperate with a scraper to scrape the metallic articles from the magnet plates when the slide is drawn outward. No further effort is required besides drawing the a slide outward to remove the metallic articles from ment of the chute;

Fig. 3 is a plan of the separating device d'etached from the chute and showing the magnet element withdrawn;

Fig. 4 is an under plan of the device with the magnet element in operative position; and

Fig. 5 is a cross-section of the device taken on the line 5-5 of Fig. 3. Referring to said drawings, the reference char-f1 acter I designates a rectangular frame which"- is interposed in a chute H. The frame has a rectangular opening [in its bottom, below which is aslide l2 which is slidably mounted in guide ways formed by rabbeted cleats l3, se-- cured to the underside of the-frame H! by any-'- suitable means such as bolts and nuts 14.

The slide 12 maycomprise angle shaped side members l2? and angle shaped end members I 2 welded together at the corners formed by the angle shapedmembers Welded to the side members l." are filler plates I2", the upper faces" 9 Claims. (Cl. 209223) of which are flush with the upper faces of the side and end members [2 I2 ,Resting on the filler plates aremagnet plates l6 which, together. It).

with the filler plates, close. the opening through the frame It.

A flexible flap 32 is secured to the top member of the chute and rests on the slide. Said flap serves to hold the grain down on the slide. A'

gate 3| is provided in the chute above the separating device, which gate may be closed to ar- 'I the spaced apart magnet plates ['6, as by bolts and nuts Ili Secured to and extending up from the end members l0", H) of the frame are side frame members l1, [8, to which are bolted or otherwise secured the side boards I9 of the chute. The bottom board of the chute is omitted at the place where the opening If! in the frame Ill is' located. The side frame member I l is formed. with a flange 2|, welded or otherwise fastened to the end frame members 10 and its lower edge acts as a scraper for scraping the metallic articles from the magnet plates. The flange 2! is formed with tongues 26 which project down into the spaces between the magnet plates.

Secured to the upper faces of the side frame members l2 of the slide are non-metallic strips of material 22 of the same width as the width of the magnet plates 16.

The slide is provided with a handle 23 on one edge by means of which the slide may be drawn outwards or pushed back into place. Lugs 24, secured to the under side of the slide, cooperate with stop lugs 25, 25* carried by the cleats 13, to limit the inward and outward movement of the slide.

Projecting down from the side frame member l8 are tongues 26, which project into the spaces between the magnet plates and close the ends thereof. 1

Beyondthe slide the end member ill of the. frame is formed with an opening. 2'! normally closedby-a-trap door 28, having a metal arm 29 welded to a rod 29 secured to. theunderside of the trapdoor and fulcrumed in ears 28 which projectdown from the frame member |U.

The arm 29 normally extends under one of the.

magnets l 5 and is attracted thereby, whereby the trap door is normally held in its closed position. The arm 29 is provided with a handle 30, which door.

The arm normally stands in front of a stop member on one of the magnets, which may comprise one of the bolts and nuts [6 and prevents the slide from being drawn outward until the trap door has been opened. When the trap door is opened, any material in the chute above it will discharge through the opening 21 in the frame member 1, and this will happen if the attendant has not closed the gate 35 in the chute, which gate must be closed when the magnet plates are to be cleaned.

In operation, the grain or other mobile material fiows down the chute and across the frame members Hl l, the magnet plates i5, filler plates l2, and the trap door 28, and any metallic articles mixed with the material are attracted by the magnet plates and lodge thereon. When it becomes necessary to rid the magnet plates of the collected metallic articles, the gates! isclosed and the trap door 28 is opened, thereby moving the arm 29 out of the path of the stop member Hi The attendant then. draws the slide outward as far as it will go, the edge of the flange 2! of the side frame member ll scraping the metallic articles from. the magnet plates, which articles fall through the opening ill in the frame when the magnet. plates are being moved to the outward limit of their movement. The slide is then pushed back into place and the trap door is closed, thereby again bringing the arm 29 into position to prevent the slide. from being drawn outward. During the outward movement of the slide, the. tongues 26 have scraped away any collected material in. the grooves between the magnet plates. Obviously one or more. receptacles (not shown). may be placed under the openings in the. frame to collect material discharged through said openings.

Having thus described my invention, it is obvious that various immaterial modifications may be made in the same Without departing from the spirit of my invention; hence, I do not wish to be understood as limiting myself to the exact form, construction, arrangement and combination of parts herein shown and described or uses mentioned.

What I claim as new and desire to secure by Letters Patent is: p

1. A device for separating metallic articles from grain and other edibles, comprising a frame arranged to be interposed in a chute and having an opening therethrough, an outwardly movable slide slidably supported below said frame in closeproximity thereto, magnets carried by said. slide, and magnet plates secured to said magnets, side frame members extending up from the plates with the lower edges of one side frame member located in close proximity to the upper face of the magnet plates, and functioning to scrape metallic articles from the magnet plates when the slide is drawn outward. 2. A device for. separating, metallic articles:

from grain and the like, "comprising a "frame:

arranged to be interposedin. av chute and having an opening therethrough, an outwardly movable. slide located below-saidliop'eningl guides for sup porting said slide, magnets carried'by said slide, magnet plates connected to saidmagnets, side.-

whereby to prevent the slide from being drawn outward except when the arm is moved away from said projection.

4. A device for separating metallic articles from grain and the like, comprising a fram arranged to be interposed in a chute and having an opening therethrough, an outwardly movable slide located below saidopening, guides for supporting said slide, magnets carried by said slide, magnet plates connected to said magnets, side frame members extending up from said plates, one of which functions as a scraper for said plates, a trap door closing an, opening inv said frame, a projection on one of the magnets, and a swingable metal arm: secured to said trap door and fulcrumed on the frame and attracted to the magnet by the latter to stand in front of said projection, and thereby prevent the slide from being drawn outward except when the arm is moved away from the projection.

5. A device for separating metallic articles from grain and other edibles, comprising a frame arranged to be interposed. in. a chute and having an opening therethrough, an outwardly movable slide slidably supported below said frame in close proximity thereto, magnets carried by said.

slide, and spaced apart magnet plates bolted to said magnets, filler plates below the spaces between said magnet plates, side frame members extending up from the plates with their lower edges located i close. proximity to the upper face of the magnet plates, and functioning to scrape metallic articles from the magnet plates when the slide is drawn outward, at least one of said side frame members having tongues extending down into the spaces between the magnet plates.

6. A device for separating metallic articles from grain and the like, comprising a frame arranged to be interposed in a chute and having an opening therethrough, an outwardly movable slide located below said opening, guides for supporting said slide, magnets carried by said slide, spaced apart magnet plates bolted to said magnets, filler plates below thespaces between the magnet plates, side frame members extending up from said plates, one of which functions as a scraper for said magnet plates and said filler plates, and means to limit the-inward and outward movements of the slide.

7. A device for separating metallic articles from grain and the like, comprising a frame arranged to be interposed in a chute and having an opening therethrough, an, outwardly movable slide located below said opening, guides for supporting saidslide, magnetsxcarried by said -slide,.magnet.

plates connected-tosaid magnets, sidev frame. members extending up from. said, plates, one of which functions as a scraper for said plates, a projection on one. of said, magnets, a swingable arm fulcrumed on said frame, normally standing infront of said projection whereby to prevent the slide from.- being drawn outward except when the arm is moved away-from said projection, and means to limit the inward-and outward movements of the-slide.

8. A device for separating metallic articles from grain and the like, comprising a frame arranged to be interposed in a chute and having an opening therethrough, an outwardly movable slide located below said opening, guides for supporting said slide, magnets carried by said slide, magnet plates connected to said magnets, side frame members extending up from said plates, one of which functions as a scraper for said plates, a trap door closing and opening in said frame, a projection on one of the magnets, a swingable metal arm secured to said trap door and fulcrumed on the frame and attracted to the magnet by the latter to stand in front of said projection, and thereby prevent the slide from being drawn outward except when the arm is moved away from the projection, and stop means to limit the inward and outward movements of said slide.

9. In a device for separating metallic articles from loose, non-magnetic material, a carrier adapted to extend across an opening in the bottom wall of a duct through which such material is to be passed, means for supporting said carrier in operative position across such an opening to normally close the latter, said carrier being slidable relative to said means in a plane extending substantially parallel to the plane of said opening, a magnetized member carried by said carrier and movable therewith, said member having a face forming a portion of the material engageable face of said carrierand operative to attract and hold metallic articles in material passing over the same, and a scraper element stationarily related to said carrier supporting means having an edge complementary to said face of said magnetized member and engageable therewith when said carrier is moved to an inoperative position for scraping metallic articles from such face of the magnetized member.

JOHN KOTILINEK.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 59,509 Krom Nov. 6, 1866 388,659 Frank Aug. 28, 1888 1,590,339 Wood June 29, 1926 2,293,664 Roberts Aug. 18, 1942 2,340,303 Byrd Feb. 1, 1944 

